Display IP Addresses On The System Console *before* The Login Prompt.
I have a bunch of VBox Linux VMs (CentOS 6/7, Debian7/8/9, Ubuntu
(14.0/16.04, Alpine) that get dynamic IPs. To get their respecitive IP addresses I have to login and run ‘ip addr’
I would like such info to be displayed on the VM console *before* the login prompt. Ideally an ASCII log + info (see below sig line). Thus, I can get the info from the VM console without having to login.
I read up on /etc/issue but adding “\4{eth0}” to the existing string does not work.
TIA for solutions/pointers
— Arun Khan
_ _
| |__ ___ ___| |_ _ __ __ _ _ __ ___ ___
| ‘_ \ / _ \/ __| __| ‘_ \ / _` | ‘_ ` _ \ / _ \
| | | | (_) \__ \ |_| | | | (_| | | | | | | __/
|_| |_|\___/|___/\__|_| |_|\__,_|_| |_| |_|\___|
lo: 127.0.0.1
eth0: 10.1.1.122
kernel: 4.10.0-33-generic x86_64
login:
4 thoughts on - Display IP Addresses On The System Console *before* The Login Prompt.
What does ‘man agetty’ (or whatever you’re using) on the OS in question say?
Ubuntu 14.04 doesn’t list “\4{}” as an option and it doesn’t work, 16.04 does and it does appear there (might have to press Enter to get a screen refresh).
If the OS doesn’t support it then you’ll have to get creative (send ‘ip addr’ output to /etc/issue at boot or periodically) to get what you want.
—– Original Message —–
From: “Arun Khan”
To: “CentOS”
Sent: Monday, October 2, 2017 3:03:00 PM
Subject: [CentOS] Display IP addresses on the system console *before* the login prompt.
I have a bunch of VBox Linux VMs (CentOS 6/7, Debian7/8/9, Ubuntu
(14.0/16.04, Alpine) that get dynamic IPs. To get their respecitive IP addresses I have to login and run ‘ip addr’
I would like such info to be displayed on the VM console *before* the login prompt. Ideally an ASCII log + info (see below sig line). Thus, I can get the info from the VM console without having to login.
I read up on /etc/issue but adding “\4{eth0}” to the existing string does not work.
TIA for solutions/pointers
— Arun Khan
_ _
| |__ ___ ___| |_ _ __ __ _ _ __ ___ ___
| ‘_ \ / _ \/ __| __| ‘_ \ / _` | ‘_ ` _ \ / _ \
| | | | (_) \__ \ |_| | | | (_| | | | | | | __/
|_| |_|\___/|___/\__|_| |_|\__,_|_| |_| |_|\___|
lo: 127.0.0.1
eth0: 10.1.1.122
kernel: 4.10.0-33-generic x86_64
login:
El 2/10/17 a las 22:03, Arun Khan escribió:
This works for me in CentOS 7 (in /etc/issue)
System IPv4: \4{ens33}
You must replace {ens33} with the nic name you want to show. Get it with ifconfig
You are right, Ubuntu 14.04 does not support it and that’s where it does *not* work. I read the getty man page in CentOS 7/Ubuntu 16.04
and implemented in Ubuntu 14.04 duh.
— Arun Khan
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